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SPACETELESCOPESCIENCEINSTITUTE Summary
of
FOC
Activities
for
the
period
9
August
­
12
September
1992
FOC
Status
.
F/96
Performance
has
been
nominal.
.
F/96
standard
aperture
showed
a
2
arc­second
drift
in
V2V3
.
On
Day
261,
the
high
voltage
of
the
F/48
relay
intensifier
tripped.
The
F/48
was
being
configured
to
start
a
sequence
of
parallel
exposures.
The
high­voltage
came
up
as
nominal,
stayed
up
for
30
seconds
and
then
tripped
for
no
apparent
reason
while
the
shutter
was
still
closed.
At
the
end
of
the
observation
set,
the
camera
was
brought
back
to
HOLD
mode.
Subsequently,
the
decision
was
taken
to
SAFE
the
FOC
to
avoid
a
turn­on
scheduled
for
the
following
evening.
The
FOC
is
presently
still
in
SAFE
mode.
A
plan
of
recovery
has
been
implemented
with
exit
from
SAFE
mode
scheduled
for
DAY
272,
and
resume
of
normal
F/96
oper­
ation.
All
the
future
F/48
observations
have
been
suspended
and
a
plan
of
recovery
for
the
F/48
camera
is
now
in
progress.
FOC
Report
September
1992

SPACETELESCOPESCIENCEINSTITUTE SPACETELESCOPESCIENCEINSTITUTE Summary
of
FOC
Activities
for
the
period
9
August
­
12
September
1992
Calibration
Activities
ID
TITLE
DATE
RESULTS
(week
of)
2807
Plate
Scale
and
Distortion
16
August
success
2919
FOC
Optical
Focus
30
August
success
3428
F/96
High­voltage
Turn­on
30
August
success
3429
F/48
High­voltage
Turn­on
30
August
success
FOC
Report
September
1992

SPACETELESCOPESCIENCEINSTITUTE Summary
of
FOC
Activities
for
the
period
9
August
­
12
September
1992
Documentation
and
Reports
.
``Pipeline
Reprocessing
of
FOC
data''­
ISR
FOC­064,
D.A.
Baxter
.
``Reduction
and
Analysis
of
Objective
Prism
Images''
­
DRAFT,
W.
Hack
.
All
Cycle
2
GO
and
GTO
programs
have
been
reviewed
Operations .
The
following
GO
programs
were
executed
successfully
2680
Cross­dispersion
Imaging
of
Hot+Cool
Binaries
4029
HST
Medium
Deep
survey:
Cycle
1
Part
3
3815
UV
Observations
of
the
Hubble­Sandage
Variables
in
M31
&
M33
4018
HST
Medium
Deep
Survey:
Cycle
1
Part
2
3984
Detecting
the
Neutron
Star
in
Gamma­ray
Bursters
FOC
Report
September
1992

SPACETELESCOPESCIENCEINSTITUTE Summary
of
FOC
Activities
for
the
period
9
August
­
12
September
1992
Operations
(cont'd)
.
4
GTO
programs
were
executed
successfully.
.
One
observation
set
of
Proposal
4029
taken
on
23
August
exhibited
higher
than
average
background
counts
along
with
a
`flare'
feature
in
the
F/48
relay.
The
high
background
counts
most
probably
resulted
from
being
near
the
SAA
during
most
of
the
observation
set
and
from
high
particle
rates.
The
`flare'
feature
appeared
strong
in
one
observation,
then
faded
below
the
background
counts
in
subsequent
images.
F/48
images
are
now
being
monitored
for
further
occurrences.
FOC
Report
September
1992